An anvil for a surgical stapler



FIG. 1 is a perspective view of an anvil for a surgical stapler showing our new design, the broken line showing of the shaft is for illustrative purposes only and forms no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for an anvil for a surgical stapler, as shown and described. 